Westinghouse HMA3700T Molded Case Circuit Breaker Trip Unit

Description:

The Westinghouse HMA3700T Trip Unit is used in industrial molded case circuit breakers to provide overcurrent and short-circuit protection for high-current electrical distribution systems. Commonly installed in motor control centers, switchboards, power distribution panels, and industrial facilities utilizing Westinghouse MA, HMA, and MAY frame circuit breakers. Maintenance teams, OEMs, and system integrators use this trip unit for repair, retrofit, equipment upgrades, or replacement to maintain dependable circuit protection and safe electrical system operation.

Applications:

The Westinghouse HMA3700T Trip Unit is used in industrial molded case circuit breakers. It is commonly installed in motor control centers, switchgear assemblies, industrial power distribution systems, manufacturing facilities, and commercial electrical installations using 600 A to 800 A MA, HMA, and MAY breaker frames.

Technical Specifications:

• Manufacturer Part Number (MPN): HMA3700T
• Product Type: Trip Unit
• Brand: Westinghouse
• Manufacturer: Westinghouse Electric Corporation
• Secondary Part Number: 371D373G26
• Series: HMA, MARK 75
• Current Rating: 700 A
• Number of Poles: 3
• Rated Voltage: 600 VAC
• Protection Type: Thermal Magnetic
• Trip Functions: Long Time, Instantaneous (LI)
• Compatible Frame Types: MA, HMA, MAY
• Compatible Breaker Rating: 600 A to 800 A
• Mounting Type: Interchangeable Trip Unit
• Application: Molded Case Circuit Breakers

Common Replacements:

• Westinghouse HMA3600T Trip Unit
• Westinghouse HMA3800T Trip Unit
• Eaton HMA3700T-R Trip Unit